You can spend well on a lock and still lose the bike if you lock it badly — and you can make a modest lock work hard with good technique. How you lock up matters as much as what you lock up with. For choosing the lock itself, see locks and theft prevention; this is how to use it.
Lock to the right thing
Find something fixed and solid — a proper bike rack bolted to the ground, not a flimsy sign, a slim tree, or a post the bike can be lifted clean over. A thief’s easiest win is a bike that can be carried away still locked. If the “rack” wobbles or ends above head height, it isn’t one.
Capture the frame and the back wheel
Put the lock through the frame and the rear wheel, both around the fixed object. The rear wheel is the expensive one, and locking the frame alone leaves the bike free to have its wheels stripped. A compact U-lock makes this easy; a chain or folding lock threads through the same points.
Don’t forget the easy-to-grab bits
- Quick-release wheels and saddles come off in seconds. Take the front wheel to the rear and lock both together, use a second lock or cable, or take the saddle with you.
- Lights, bags, pumps, computers — anything clipped on can walk off. Take the small valuables.
Where and when
Park where it’s busy and well-lit — a thief wants privacy and quiet. A bike among other bikes on a public street is a harder target than one alone down a side alley. Two different locks (say a U-lock plus a folding lock) force a thief to carry two different tools, which is often enough to send them looking elsewhere.
This is durable, well-established locking technique — the goal is simply to be slower and louder to steal than the next bike along. Run the quick check below until it’s second nature.